[datatable-help] setkey on .SD

Michael Smith my.r.help at gmail.com
Sat May 10 08:45:03 CEST 2014


All,

?data.table says that `.SD` is read-only. However, I could use `setkey`
on it. Is this officially supported, or is it dangerous to use on `.SD`,
e.g. since in some corner cases some unexpected behavior could occur.

Thanks,

M


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